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Chapter 6. Post-migration activities 153

Figure 6-33 Generate deployment code

6.4 Adding and modifying code

In this section we describe some of the code additions and modifications you

must make to successfully complete the migration.

6.4.1 Business logic layer

This section describes how the business logic layer needs to be altered in order

to complete the migration.

Configuring the business process

To configure the business process, follow these steps:

1. Open the application.xml file in the META-INF folder of the BaseSample

project in J2EE perspective. In the Module tab, click Add to include following

modules:

– BTTCHAEJB

– BTTCHAWeb

154 IBM Branch Transformation Toolkit 5.1 Migration and Usage Guidelines

– BTTFormatterEJB

– bttsvcinfra

– BTTServiceInfraWeb

– DSE_SampleApplicationClient

2. Click Add in the lower panel to add Project Utility JARs. Select

UserDefineJar and BaseSampleProcess project separately. Save and

close the file. See Figure 6-34.

Figure 6-34 Add utility JARs

3. Right-click the BaseSampleProcess project. In the pop-up menu, select

New → Package to create a package named

com.ibm.btt.samples.services. Then create two Java classes named

DummyJournal and DummyJournalImpl in that package. See the source code in

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Appendix A, “Branch Transformation Toolkit development and runtime

requirements” on page 477 and Appendix B, “Setting up a Branch

Transformation Toolkit sample application” on page 493.

4. Right-click the BaseSampleProcess project, and in the pop-up menu, select

Properties. Select Java JAR Dependencies, and add the following JARs as

dependencies:

– bttbase.jar

– bttfmt.jar

– bttjdbjsvc.jar

– bttjdbtsvc.jar

– bttsvcinfra.jar

– bttsvrbean.jar

– bttsvrflow.jar

–sn0dummy.jar

– UserDefineJar.jar

Click OK. See Figure 6-35

Figure 6-35 JAR dependencies

156 IBM Branch Transformation Toolkit 5.1 Migration and Usage Guidelines

5. Implement the snippets for the customerSearchServerOp business process.

Expand the BaseSampleProcess project, and find the package named

customerSearchServerOp.snippets. There are three Java files inside:

initial.java, state2.java, and state3.java. Migration Tools only provides

template for these classes. You should implement them depending on their

business logic.

– Code modification of initial.java

Add the required import class code in Example 6-1 on top:

Example 6-1 Import class code for initial.java

import com.ibm.btt.base.Context;

import com.ibm.btt.formatter.client.FormatElement;

import com.ibm.btt.services.jdbcjournalservice.Journal;

import com.ibm.dse.samples.appl.HostField;

In execute() method, add this code in Example 6-2:

Example 6-2 Additional code for initial.java execute() method

try{

Context bpContext = getContext() ;

if(bpContext.getParent() == null){

Context parent =

Context.getContextByInstanceID(getSystemData().getInstanceId()) ;

bpContext.chainTo(parent);

}

Journal journal;

String hostBuff =

((FormatElement)getFormat("customerSearchSendFmt")).format(getContext())

;

setValueAt("HostBuff",hostBuff);

// writes to the journal using the appropriate format

journal = (Journal)getService("JournalService");

journal.addRecord(getContext(),"preSendJournalFmt");//$NON-NLS-1$

journal.releaseServiceRequester();

} catch(Exception e){

e.printStackTrace();

}

Change "return 0" to "return 1".

– Code modification of state2.java

Add the required import class code in Example 6-3 on top.

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Example 6-3 Import class code for state2.java

import java.util.Hashtable;

import javax.resource.cci.*;

import com.ibm.btt.base.*;

import com.ibm.btt.samples.business.sna.lu0.DummyLu0ConnectionSpec;

import com.ibm.btt.samples.business.sna.lu0.DummyLu0InteractionSpec;

import com.ibm.btt.samples.business.sna.lu0.DummyLu0Record;

import com.ibm.btt.services.*;

import com.ibm.btt.services.jdbcjournalservice.Journal;

import com.ibm.btt.formatter.client.FormatElement;

In execute() method, add the code in Example 6-4.

Example 6-4 Additional code for state2.java execute() method

try{

javax.naming.Context initialContext = null;

ConnectionFactory connectionFactory = null;

if (initialContext == null) {

initialContext = new javax.naming.InitialContext();

connectionFactory = (ConnectionFactory)

initialContext.lookup("snalu0");

}

// START TRANSACTION

long begin = System.currentTimeMillis();

// For testing Component-managed authentication.

DummyLu0ConnectionSpec lu0ConnectionSpec = new

DummyLu0ConnectionSpec();

lu0ConnectionSpec.setUserName("sna");

lu0ConnectionSpec.setPassword("sna");

Connection connection =

connectionFactory.getConnection(lu0ConnectionSpec);

System.out.println("connection created...");

// Beginning of testing SYNC_SEND_RECEIVE

Interaction interaction = connection.createInteraction();

System.out.println("interaction created...");

DummyLu0InteractionSpec interactionSpec = new

DummyLu0InteractionSpec();

DummyLu0Record in = new DummyLu0Record();

DummyLu0Record out = new DummyLu0Record();

in.setData((String) getValueAt("HostBuff"));

interactionSpec.setInteractionVerb(InteractionSpec.SYNC_SEND_RECEIVE);